No. 108: Periodic Table 8. Oxygen

T-Rex: T-Rex presents The Periodic Table:
T-Rex: 8. OXYGEN
T-Rex: A dangerous, toxic, explosive, highly corrosive substance. It only exists free in our atmosphere because plants and microbes make it.
Utahraptor: Yet we inhale it harmlessly and use it to power our bodies!
Utahraptor: We're basically superheroes using this stuff to do incredible things!
T-Rex: Wow! True!
T-Rex: Remember, with great power comes great responsibility. Breathe wisely!